螺芴氧杂蒽(SFX)类有机半导体及其OLEDs

Abstract

One-pot protocol to spiro-based organic semiconductors has several advantages such as low-cost stuffs available, pot-atom-step economic (PASE) procedures, and others over the conventional o -halobiaryl method, representing the paradigm of green organic semiconductors (GOS) with the application of information technology. Herein, this review traces back to the history of spiro-compounds, including synthesis, structures and the application of electronics, followed by the discovery on one-pot synthesis of spirocyclic arenes with the merit of tandem mechanism that involves three bonding at once. We demonstrated the SFX-based molecular design platform under the four-element theory to organic semiconductors, affording a chance to get insight into structure-parameter relationship. Finally, we highlighted the SFX-based electroluminescent materials, including various fluorescent materials, RGB phosphorescent host and guest materials as well as printable OLEDs materials. Among them, the best deep-blue fluorescent OLED exhibits the maximum current efficiency (CE), the maximum power efficiency (PE) and external quantum efficiency (EQE) of 7.4 cd/A, 4.1 lm/W, 4.6%, respectively; the obtained green phosphorescent OLED with the CE of 70.0 cd/A, PE of 77.0 lm/W, EQE of 19.2%, as well as universal host materials for phosphorescent OLEDs. Finally, we outlook the spiro-based GOSs, including the obstacle of synthetic methodology to spiro-arenes, application bottleneck for OLEDs display and lighting source, potential explorations in other electronics, molecular circuits as well as smart devices.